Use mb_detect_encoding with $strict = true

Author: nicolas-grekas

Application.php

@@ -1089,7 +1089,7 @@ private function stringWidth($string)
             return strlen($string);
         }
 
-        if (false === $encoding = mb_detect_encoding($string)) {
+        if (false === $encoding = mb_detect_encoding($string, null, true)) {
             return strlen($string);
         }
 
@@ -1106,7 +1106,7 @@ private function splitStringByWidth($string, $width)
             return str_split($string, $width);
         }
 
-        if (false === $encoding = mb_detect_encoding($string)) {
+        if (false === $encoding = mb_detect_encoding($string, null, true)) {
             return str_split($string, $width);
         }
 

Helper/Helper.php

@@ -53,7 +53,7 @@ protected function strlen($string)
             return strlen($string);
         }
 
-        if (false === $encoding = mb_detect_encoding($string)) {
+        if (false === $encoding = mb_detect_encoding($string, null, true)) {
             return strlen($string);
         }
 

Helper/TableHelper.php

@@ -386,7 +386,7 @@ private function renderCell(array $row, $column, $cellFormat)
         $width = $this->getColumnWidth($column);
 
         // str_pad won't work properly with multi-byte strings, we need to fix the padding
-        if (function_exists('mb_strwidth') && false !== $encoding = mb_detect_encoding($cell)) {
+        if (function_exists('mb_strwidth') && false !== $encoding = mb_detect_encoding($cell, null, true)) {
             $width += strlen($cell) - mb_strwidth($cell, $encoding);
         }